Variable framerates in Vegas?

[TerryNG]

First off, I apologize for the long post. I just want to be as thorough as possible.

I've been working on a video in vegas that ends up with audio being out of sync. Here's the specifics.

The video is sourced from a dvd. I have tried demuxing with dvd decrypter and remuxing with tmpgenc, ripping to mpg with vob2mpg, and using the vegas import from dvd function. When I load the video into vegas and do my cutting and crossfading, everything looks great. The audio only loses sync after encoding. After multiple wasted encodes, I was watching the preview window in vegas and noticed that the frame rate was dropping occasionaly, but only for a split second before going back up to 29.970. It drops and raises so fast that I can't even tell what it drops to. It looks like 29.670, but I'm not totally sure.

I opened up the dvd files in Media Info. All the .VOB files are showing 29.97 as the frame rate, and the .IFO files are showing an even 30. The audio streams on the dvd are 48khz AC3, as are the streams on the ripped mpg's.

The person who originally shot the video and put them on dvd broke the video up into 3 VTS groups, and there is overlapping between the groups, so I'm trying to cut the overlapping parts out and put a slight crossfade, to make the splices less noticable. I've made sure that I cut both the audio and video tracks.

I know that vegas will drop framerates on the preview while it's building the video timeline, and if the system is under stress and causes it to lag, but I have nothing else running on my computer that should be causing that.

Any ideas?

Thanks

[BJ_M]

preview frame rate has nothing to do with final frame rate ..

you should convert the audio to wav in this case first -- then do a manual sync

[TerryNG]

Thanks for the suggestion. I converted the AC3 to WAV using PX3 Convertor, but now it's off sync in vegas during editing. I'll line it up at the beginning, but by the end, it's off. Media Info shows both the video and audio as being the same lengths, so it's got me stumped. I guess I'll do some more searching to figure out the best way to take care of this issue.

Thanks again
Terry

[BJ_M]

hold down the control key and select the end of the audio track and stretch it until it syncs up (use a loud pop if you can near the end)

[TerryNG]

I officially give up. I used the ripple method to line up the audio, got everything looking good, then rendered. The audio was off again. I've treid rendering as a single file, and as seperate audio and video streams. I also rendered the audio to both wav and ac3.

Thanks for you help tho.

[BJ_M]

ripple method ?

ripple in vegas is something completely different unless i dont understand what you mean ..

[TerryNG]

When I held down the control button and moved the audio, the icon had waves next to it so I just assumed that it was a ripple tool.